android UI 往右滑动，滑动到最后一页就自动加载数据并显示
如图：



Java代码
  1. packagecn.anycall.ju;
  3. importjava.util.ArrayList;
  4. importjava.util.HashMap;
  5. importjava.util.List;
  6. importjava.util.Map;
  8. importandroid.app.Activity;
  9. importandroid.content.ActivityNotFoundException;
  10. importandroid.content.Context;
  11. importandroid.content.Intent;
  12. importandroid.content.pm.ResolveInfo;
  13. importandroid.os.Bundle;
  14. importandroid.os.Handler;
  15. importandroid.os.Looper;
  16. importandroid.os.Message;
  17. importandroid.view.KeyEvent;
  18. importandroid.view.View;
  19. importandroid.view.Window;
  20. importandroid.widget.AdapterView;
  21. importandroid.widget.AdapterView.OnItemClickListener;
  22. importandroid.widget.GridView;
  23. importandroid.widget.Toast;
  24. importcn.anycall.ju.ScrollLayout.OnScreenChangeListenerDataLoad;
  26. /**
  27. *GridView分页显示安装的应用程序
  28. */
  29. publicclassAllAppListextendsActivity{
  30. privateScrollLayoutmScrollLayout;
  31. privatestaticfinalfloatAPP_PAGE_SIZE=4.0f;
  32. privateContextmContext;
  33. privatePageControlViewpageControl;
  34. publicMyHandlermyHandler;
  35. publicintn=0;
  36. privateDataLoadingdataLoad;
  37. @Override
  38. protectedvoidonCreate(BundlesavedInstanceState){
  39. //TODOAuto-generatedmethodstub
  41. super.onCreate(savedInstanceState);
  42. this.requestWindowFeature(Window.FEATURE_NO_TITLE);
  43. mContext=this;
  44. setContentView(R.layout.main);
  45. dataLoad=newDataLoading();
  46. mScrollLayout=(ScrollLayout)findViewById(R.id.ScrollLayoutTest);
  47. myHandler=newMyHandler(this,1);
  49. //起一个线程更新数据
  50. MyThreadm=newMyThread();
  51. newThread(m).start();
  52. }
  54. /**
  55. *gridView的onItemLick响应事件
  56. */
  57. publicOnItemClickListenerlistener=newOnItemClickListener(){
  59. publicvoidonItemClick(AdapterView<?>parent,Viewview,intposition,
  60. longid){
  61. //TODOAuto-generatedmethodstub
  62. System.out.println("position="+position);
  63. }
  65. };
  67. @Override
  68. protectedvoidonDestroy(){
  69. //TODOAuto-generatedmethodstub
  70. android.os.Process.killProcess(android.os.Process.myPid());
  71. super.onDestroy();
  72. }
  74. @Override
  75. publicbooleanonKeyDown(intkeyCode,KeyEventevent){
  76. //TODOAuto-generatedmethodstub
  77. if(keyCode==KeyEvent.KEYCODE_BACK){
  78. finish();
  79. returntrue;
  80. }
  81. returnsuper.onKeyDown(keyCode,event);
  82. }
  86. //更新后台数据
  87. classMyThreadimplementsRunnable{
  88. publicvoidrun(){
  89. try{
  90. Thread.sleep(1000*3);
  91. }catch(InterruptedExceptione){
  92. //TODOAuto-generatedcatchblock
  93. e.printStackTrace();
  94. }
  95. Stringmsglist="1";
  96. Messagemsg=newMessage();
  97. Bundleb=newBundle();//存放数据
  98. b.putString("rmsg",msglist);
  99. msg.setData(b);
  100. AllAppList.this.myHandler.sendMessage(msg);//向Handler发送消息,更新UI
  102. }
  103. }
  105. classMyHandlerextendsHandler{
  106. privateAllAppListmContext;
  107. publicMyHandler(Contextconn,inta){
  108. mContext=(AllAppList)conn;
  109. }
  111. publicMyHandler(LooperL){
  112. super(L);
  113. }
  115. //子类必须重写此方法,接受数据
  116. @Override
  117. publicvoidhandleMessage(Messagemsg){
  118. //TODOAuto-generatedmethodstub
  119. super.handleMessage(msg);
  120. Bundleb=msg.getData();
  121. Stringrmsg=b.getString("rmsg");
  122. if("1".equals(rmsg)){
  123. //donothing
  124. List<Map>list=newArrayList<Map>();
  125. for(inti=0;i<16;i++){
  126. n++;
  127. Mapmap=newHashMap();
  128. map.put("name",n);
  129. list.add(map);
  130. }
  132. intpageNo=(int)Math.ceil(list.size()/APP_PAGE_SIZE);
  133. for(inti=0;i<pageNo;i++){
  134. GridViewappPage=newGridView(mContext);
  135. //getthe"i"pagedata
  136. appPage.setAdapter(newAppAdapter(mContext,list,i));
  137. appPage.setNumColumns(2);
  138. appPage.setOnItemClickListener(listener);
  139. mScrollLayout.addView(appPage);
  140. }
  141. //加载分页
  142. pageControl=(PageControlView)findViewById(R.id.pageControl);
  143. pageControl.bindScrollViewGroup(mScrollLayout);
  144. //加载分页数据
  145. dataLoad.bindScrollViewGroup(mScrollLayout);
  147. }
  148. }
  150. }
  153. //分页数据
  154. classDataLoading{
  155. privateintcount;
  156. publicvoidbindScrollViewGroup(ScrollLayoutscrollViewGroup){
  157. this.count=scrollViewGroup.getChildCount();
  158. scrollViewGroup.setOnScreenChangeListenerDataLoad(newOnScreenChangeListenerDataLoad(){
  159. publicvoidonScreenChange(intcurrentIndex){
  160. //TODOAuto-generatedmethodstub
  161. generatePageControl(currentIndex);
  162. }
  163. });
  164. }
  166. privatevoidgeneratePageControl(intcurrentIndex){
  167. //如果到最后一页，就加载16条记录
  168. if(count==currentIndex+1){
  169. MyThreadm=newMyThread();
  170. newThread(m).start();
  171. }
  172. }
  173. }
  174. }
[java] view plain copy
  1. packagecn.anycall.ju;
  3. importjava.util.ArrayList;
  4. importjava.util.HashMap;
  5. importjava.util.List;
  6. importjava.util.Map;
  8. importandroid.app.Activity;
  9. importandroid.content.ActivityNotFoundException;
  10. importandroid.content.Context;
  11. importandroid.content.Intent;
  12. importandroid.content.pm.ResolveInfo;
  13. importandroid.os.Bundle;
  14. importandroid.os.Handler;
  15. importandroid.os.Looper;
  16. importandroid.os.Message;
  17. importandroid.view.KeyEvent;
  18. importandroid.view.View;
  19. importandroid.view.Window;
  20. importandroid.widget.AdapterView;
  21. importandroid.widget.AdapterView.OnItemClickListener;
  22. importandroid.widget.GridView;
  23. importandroid.widget.Toast;
  24. importcn.anycall.ju.ScrollLayout.OnScreenChangeListenerDataLoad;
  26. /**
  27. *GridView分页显示安装的应用程序
  28. */
  29. publicclassAllAppListextendsActivity{
  30. privateScrollLayoutmScrollLayout;
  31. privatestaticfinalfloatAPP_PAGE_SIZE=4.0f;
  32. privateContextmContext;
  33. privatePageControlViewpageControl;
  34. publicMyHandlermyHandler;
  35. publicintn=0;
  36. privateDataLoadingdataLoad;
  37. @Override
  38. protectedvoidonCreate(BundlesavedInstanceState){
  39. //TODOAuto-generatedmethodstub
  41. super.onCreate(savedInstanceState);
  42. this.requestWindowFeature(Window.FEATURE_NO_TITLE);
  43. mContext=this;
  44. setContentView(R.layout.main);
  45. dataLoad=newDataLoading();
  46. mScrollLayout=(ScrollLayout)findViewById(R.id.ScrollLayoutTest);
  47. myHandler=newMyHandler(this,1);
  49. //起一个线程更新数据
  50. MyThreadm=newMyThread();
  51. newThread(m).start();
  52. }
  54. /**
  55. *gridView的onItemLick响应事件
  56. */
  57. publicOnItemClickListenerlistener=newOnItemClickListener(){
  59. publicvoidonItemClick(AdapterView<?>parent,Viewview,intposition,
  60. longid){
  61. //TODOAuto-generatedmethodstub
  62. System.out.println("position="+position);
  63. }
  65. };
  67. @Override
  68. protectedvoidonDestroy(){
  69. //TODOAuto-generatedmethodstub
  70. android.os.Process.killProcess(android.os.Process.myPid());
  71. super.onDestroy();
  72. }
  74. @Override
  75. publicbooleanonKeyDown(intkeyCode,KeyEventevent){
  76. //TODOAuto-generatedmethodstub
  77. if(keyCode==KeyEvent.KEYCODE_BACK){
  78. finish();
  79. returntrue;
  80. }
  81. returnsuper.onKeyDown(keyCode,event);
  82. }
  86. //更新后台数据
  87. classMyThreadimplementsRunnable{
  88. publicvoidrun(){
  89. try{
  90. Thread.sleep(1000*3);
  91. }catch(InterruptedExceptione){
  92. //TODOAuto-generatedcatchblock
  93. e.printStackTrace();
  94. }
  95. Stringmsglist="1";
  96. Messagemsg=newMessage();
  97. Bundleb=newBundle();//存放数据
  98. b.putString("rmsg",msglist);
  99. msg.setData(b);
  100. AllAppList.this.myHandler.sendMessage(msg);//向Handler发送消息,更新UI
  102. }
  103. }
  105. classMyHandlerextendsHandler{
  106. privateAllAppListmContext;
  107. publicMyHandler(Contextconn,inta){
  108. mContext=(AllAppList)conn;
  109. }
  111. publicMyHandler(LooperL){
  112. super(L);
  113. }
  115. //子类必须重写此方法,接受数据
  116. @Override
  117. publicvoidhandleMessage(Messagemsg){
  118. //TODOAuto-generatedmethodstub
  119. super.handleMessage(msg);
  120. Bundleb=msg.getData();
  121. Stringrmsg=b.getString("rmsg");
  122. if("1".equals(rmsg)){
  123. //donothing
  124. List<Map>list=newArrayList<Map>();
  125. for(inti=0;i<16;i++){
  126. n++;
  127. Mapmap=newHashMap();
  128. map.put("name",n);
  129. list.add(map);
  130. }
  132. intpageNo=(int)Math.ceil(list.size()/APP_PAGE_SIZE);
  133. for(inti=0;i<pageNo;i++){
  134. GridViewappPage=newGridView(mContext);
  135. //getthe"i"pagedata
  136. appPage.setAdapter(newAppAdapter(mContext,list,i));
  137. appPage.setNumColumns(2);
  138. appPage.setOnItemClickListener(listener);
  139. mScrollLayout.addView(appPage);
  140. }
  141. //加载分页
  142. pageControl=(PageControlView)findViewById(R.id.pageControl);
  143. pageControl.bindScrollViewGroup(mScrollLayout);
  144. //加载分页数据
  145. dataLoad.bindScrollViewGroup(mScrollLayout);
  147. }
  148. }
  150. }
  153. //分页数据
  154. classDataLoading{
  155. privateintcount;
  156. publicvoidbindScrollViewGroup(ScrollLayoutscrollViewGroup){
  157. this.count=scrollViewGroup.getChildCount();
  158. scrollViewGroup.setOnScreenChangeListenerDataLoad(newOnScreenChangeListenerDataLoad(){
  159. publicvoidonScreenChange(intcurrentIndex){
  160. //TODOAuto-generatedmethodstub
  161. generatePageControl(currentIndex);
  162. }
  163. });
  164. }
  166. privatevoidgeneratePageControl(intcurrentIndex){
  167. //如果到最后一页，就加载16条记录
  168. if(count==currentIndex+1){
  169. MyThreadm=newMyThread();
  170. newThread(m).start();
  171. }
  172. }
  173. }
  174. }


Java代码
  1. packagecn.anycall.ju;
  3. importjava.util.ArrayList;
  4. importjava.util.List;
  5. importjava.util.Map;
  7. importandroid.content.Context;
  8. importandroid.content.pm.PackageManager;
  9. importandroid.content.pm.ResolveInfo;
  10. importandroid.view.LayoutInflater;
  11. importandroid.view.View;
  12. importandroid.view.ViewGroup;
  13. importandroid.widget.BaseAdapter;
  14. importandroid.widget.ImageView;
  15. importandroid.widget.TextView;
  17. importcn.anycall.ju.R;
  19. publicclassAppAdapterextendsBaseAdapter{
  20. privateList<Map>mList;
  21. privateContextmContext;
  22. publicstaticfinalintAPP_PAGE_SIZE=4;
  23. privatePackageManagerpm;
  25. publicAppAdapter(Contextcontext,List<Map>list,intpage){
  26. mContext=context;
  27. pm=context.getPackageManager();
  29. mList=newArrayList<Map>();
  30. inti=page*APP_PAGE_SIZE;
  31. intiEnd=i+APP_PAGE_SIZE;
  32. while((i<list.size())&&(i<iEnd)){
  33. mList.add(list.get(i));
  34. i++;
  35. }
  36. }
  37. publicintgetCount(){
  38. //TODOAuto-generatedmethodstub
  39. returnmList.size();
  40. }
  42. publicObjectgetItem(intposition){
  43. //TODOAuto-generatedmethodstub
  44. returnmList.get(position);
  45. }
  47. publiclonggetItemId(intposition){
  48. //TODOAuto-generatedmethodstub
  49. returnposition;
  50. }
  52. publicViewgetView(intposition,ViewconvertView,ViewGroupparent){
  53. //TODOAuto-generatedmethodstub
  54. MapappInfo=mList.get(position);
  55. AppItemappItem;
  56. if(convertView==null){
  57. Viewv=LayoutInflater.from(mContext).inflate(R.layout.app_item,null);
  59. appItem=newAppItem();
  60. appItem.mAppIcon=(ImageView)v.findViewById(R.id.imgdetail);
  61. appItem.mAppName=(TextView)v.findViewById(R.id.tuaninfo);
  63. v.setTag(appItem);
  64. convertView=v;
  65. }else{
  66. appItem=(AppItem)convertView.getTag();
  67. }
  68. //settheicon
  69. appItem.mAppIcon.setImageResource(R.drawable.icon);
  70. //settheappname
  71. appItem.mAppName.setText(appInfo.get("name").toString());
  73. returnconvertView;
  74. }
  76. /**
  77. *每个应用显示的内容，包括图标和名称
  78. *@authorYao.GUET
  79. *
  80. */
  81. classAppItem{
  82. ImageViewmAppIcon;
  83. TextViewmAppName;
  84. }
  85. }
[java] view plain copy
  1. packagecn.anycall.ju;
  3. importjava.util.ArrayList;
  4. importjava.util.List;
  5. importjava.util.Map;
  7. importandroid.content.Context;
  8. importandroid.content.pm.PackageManager;
  9. importandroid.content.pm.ResolveInfo;
  10. importandroid.view.LayoutInflater;
  11. importandroid.view.View;
  12. importandroid.view.ViewGroup;
  13. importandroid.widget.BaseAdapter;
  14. importandroid.widget.ImageView;
  15. importandroid.widget.TextView;
  17. importcn.anycall.ju.R;
  19. publicclassAppAdapterextendsBaseAdapter{
  20. privateList<Map>mList;
  21. privateContextmContext;
  22. publicstaticfinalintAPP_PAGE_SIZE=4;
  23. privatePackageManagerpm;
  25. publicAppAdapter(Contextcontext,List<Map>list,intpage){
  26. mContext=context;
  27. pm=context.getPackageManager();
  29. mList=newArrayList<Map>();
  30. inti=page*APP_PAGE_SIZE;
  31. intiEnd=i+APP_PAGE_SIZE;
  32. while((i<list.size())&&(i<iEnd)){
  33. mList.add(list.get(i));
  34. i++;
  35. }
  36. }
  37. publicintgetCount(){
  38. //TODOAuto-generatedmethodstub
  39. returnmList.size();
  40. }
  42. publicObjectgetItem(intposition){
  43. //TODOAuto-generatedmethodstub
  44. returnmList.get(position);
  45. }
  47. publiclonggetItemId(intposition){
  48. //TODOAuto-generatedmethodstub
  49. returnposition;
  50. }
  52. publicViewgetView(intposition,ViewconvertView,ViewGroupparent){
  53. //TODOAuto-generatedmethodstub
  54. MapappInfo=mList.get(position);
  55. AppItemappItem;
  56. if(convertView==null){
  57. Viewv=LayoutInflater.from(mContext).inflate(R.layout.app_item,null);
  59. appItem=newAppItem();
  60. appItem.mAppIcon=(ImageView)v.findViewById(R.id.imgdetail);
  61. appItem.mAppName=(TextView)v.findViewById(R.id.tuaninfo);
  63. v.setTag(appItem);
  64. convertView=v;
  65. }else{
  66. appItem=(AppItem)convertView.getTag();
  67. }
  68. //settheicon
  69. appItem.mAppIcon.setImageResource(R.drawable.icon);
  70. //settheappname
  71. appItem.mAppName.setText(appInfo.get("name").toString());
  73. returnconvertView;
  74. }
  76. /**
  77. *每个应用显示的内容，包括图标和名称
  78. *@authorYao.GUET
  79. *
  80. */
  81. classAppItem{
  82. ImageViewmAppIcon;
  83. TextViewmAppName;
  84. }
  85. }

Java代码
  1. packagecn.anycall.ju;
  5. importandroid.content.Context;
  6. importandroid.util.AttributeSet;
  7. importandroid.widget.ImageView;
  8. importandroid.widget.LinearLayout;
  9. importcn.anycall.ju.R;
  10. importcn.anycall.ju.ScrollLayout.OnScreenChangeListener;
  15. publicclassPageControlViewextendsLinearLayout{
  16. privateContextcontext;
  18. privateintcount;
  20. publicvoidbindScrollViewGroup(ScrollLayoutscrollViewGroup){
  21. this.count=scrollViewGroup.getChildCount();
  22. System.out.println("count="+count);
  23. generatePageControl(scrollViewGroup.getCurrentScreenIndex());
  25. scrollViewGroup.setOnScreenChangeListener(newOnScreenChangeListener(){
  27. publicvoidonScreenChange(intcurrentIndex){
  28. //TODOAuto-generatedmethodstub
  29. generatePageControl(currentIndex);
  30. }
  31. });
  32. }
  34. publicPageControlView(Contextcontext){
  35. super(context);
  36. this.init(context);
  37. }
  38. publicPageControlView(Contextcontext,AttributeSetattrs){
  39. super(context,attrs);
  40. this.init(context);
  41. }
  43. privatevoidinit(Contextcontext){
  44. this.context=context;
  45. }
  47. privatevoidgeneratePageControl(intcurrentIndex){
  48. this.removeAllViews();
  50. intpageNum=6;//显示多少个
  51. intpageNo=currentIndex+1;//第几页
  52. intpageSum=this.count;//总共多少页
  55. if(pageSum>1){
  56. intcurrentNum=(pageNo%pageNum==0?(pageNo/pageNum)-1
  57. :(int)(pageNo/pageNum))
  58. *pageNum;
  60. if(currentNum<0)
  61. currentNum=0;
  63. if(pageNo>pageNum){
  64. ImageViewimageView=newImageView(context);
  65. imageView.setImageResource(R.drawable.zuo);
  66. this.addView(imageView);
  67. }
  71. for(inti=0;i<pageNum;i++){
  72. if((currentNum+i+1)>pageSum||pageSum<2)
  73. break;
  75. ImageViewimageView=newImageView(context);
  76. if(currentNum+i+1==pageNo){
  77. imageView.setImageResource(R.drawable.page_indicator_focused);
  78. }else{
  79. imageView.setImageResource(R.drawable.page_indicator);
  80. }
  81. this.addView(imageView);
  82. }
  84. if(pageSum>(currentNum+pageNum)){
  85. ImageViewimageView=newImageView(context);
  86. imageView.setImageResource(R.drawable.you);
  87. this.addView(imageView);
  88. }
  89. }
  90. }
  91. }
[java] view plain copy
  1. packagecn.anycall.ju;
  5. importandroid.content.Context;
  6. importandroid.util.AttributeSet;
  7. importandroid.widget.ImageView;
  8. importandroid.widget.LinearLayout;
  9. importcn.anycall.ju.R;
  10. importcn.anycall.ju.ScrollLayout.OnScreenChangeListener;
  15. publicclassPageControlViewextendsLinearLayout{
  16. privateContextcontext;
  18. privateintcount;
  20. publicvoidbindScrollViewGroup(ScrollLayoutscrollViewGroup){
  21. this.count=scrollViewGroup.getChildCount();
  22. System.out.println("count="+count);
  23. generatePageControl(scrollViewGroup.getCurrentScreenIndex());
  25. scrollViewGroup.setOnScreenChangeListener(newOnScreenChangeListener(){
  27. publicvoidonScreenChange(intcurrentIndex){
  28. //TODOAuto-generatedmethodstub
  29. generatePageControl(currentIndex);
  30. }
  31. });
  32. }
  34. publicPageControlView(Contextcontext){
  35. super(context);
  36. this.init(context);
  37. }
  38. publicPageControlView(Contextcontext,AttributeSetattrs){
  39. super(context,attrs);
  40. this.init(context);
  41. }
  43. privatevoidinit(Contextcontext){
  44. this.context=context;
  45. }
  47. privatevoidgeneratePageControl(intcurrentIndex){
  48. this.removeAllViews();
  50. intpageNum=6;//显示多少个
  51. intpageNo=currentIndex+1;//第几页
  52. intpageSum=this.count;//总共多少页
  55. if(pageSum>1){
  56. intcurrentNum=(pageNo%pageNum==0?(pageNo/pageNum)-1
  57. :(int)(pageNo/pageNum))
  58. *pageNum;
  60. if(currentNum<0)
  61. currentNum=0;
  63. if(pageNo>pageNum){
  64. ImageViewimageView=newImageView(context);
  65. imageView.setImageResource(R.drawable.zuo);
  66. this.addView(imageView);
  67. }
  71. for(inti=0;i<pageNum;i++){
  72. if((currentNum+i+1)>pageSum||pageSum<2)
  73. break;
  75. ImageViewimageView=newImageView(context);
  76. if(currentNum+i+1==pageNo){
  77. imageView.setImageResource(R.drawable.page_indicator_focused);
  78. }else{
  79. imageView.setImageResource(R.drawable.page_indicator);
  80. }
  81. this.addView(imageView);
  82. }
  84. if(pageSum>(currentNum+pageNum)){
  85. ImageViewimageView=newImageView(context);
  86. imageView.setImageResource(R.drawable.you);
  87. this.addView(imageView);
  88. }
  89. }
  90. }
  91. }

Java代码
  1. packagecn.anycall.ju;
  3. importandroid.content.Context;
  4. importandroid.graphics.Canvas;
  5. importandroid.util.AttributeSet;
  6. importandroid.util.Log;
  7. importandroid.view.MotionEvent;
  8. importandroid.view.VelocityTracker;
  9. importandroid.view.View;
  10. importandroid.view.ViewConfiguration;
  11. importandroid.view.ViewGroup;
  12. importandroid.widget.Scroller;
  14. /**
  15. *仿Launcher中的WorkSapce，可以左右滑动切换屏幕的类
  16. *
  17. */
  18. publicclassScrollLayoutextendsViewGroup{
  20. privatestaticfinalStringTAG="ScrollLayout";
  21. privateScrollermScroller;
  22. privateVelocityTrackermVelocityTracker;
  24. privateintmCurScreen;
  25. privateintmDefaultScreen=0;
  27. privatestaticfinalintTOUCH_STATE_REST=0;
  28. privatestaticfinalintTOUCH_STATE_SCROLLING=1;
  30. privatestaticfinalintSNAP_VELOCITY=600;
  32. privateintmTouchState=TOUCH_STATE_REST;
  33. privateintmTouchSlop;
  34. privatefloatmLastMotionX;
  35. privatefloatmLastMotionY;
  37. privateintcurrentScreenIndex=0;
  39. publicintgetCurrentScreenIndex(){
  40. returncurrentScreenIndex;
  41. }
  43. publicvoidsetCurrentScreenIndex(intcurrentScreenIndex){
  44. this.currentScreenIndex=currentScreenIndex;
  45. }
  47. publicScrollLayout(Contextcontext,AttributeSetattrs){
  48. this(context,attrs,0);
  49. //TODOAuto-generatedconstructorstub
  50. }
  52. publicScrollLayout(Contextcontext,AttributeSetattrs,intdefStyle){
  53. super(context,attrs,defStyle);
  54. //TODOAuto-generatedconstructorstub
  55. mScroller=newScroller(context);
  57. mCurScreen=mDefaultScreen;
  58. mTouchSlop=ViewConfiguration.get(getContext()).getScaledTouchSlop();
  59. }
  61. @Override
  62. protectedvoidonLayout(booleanchanged,intl,intt,intr,intb){
  63. //TODOAuto-generatedmethodstub
  64. intchildLeft=0;
  65. finalintchildCount=getChildCount();
  66. System.out.println("childCount="+childCount);
  67. for(inti=0;i<childCount;i++){
  68. finalViewchildView=getChildAt(i);
  69. if(childView.getVisibility()!=View.GONE){
  70. finalintchildWidth=childView.getMeasuredWidth();
  71. childView.layout(childLeft,0,childLeft+childWidth,
  72. childView.getMeasuredHeight());
  73. childLeft+=childWidth;
  74. }
  75. }
  76. }
  78. @Override
  79. protectedvoidonMeasure(intwidthMeasureSpec,intheightMeasureSpec){
  80. Log.e(TAG,"onMeasure");
  81. super.onMeasure(widthMeasureSpec,heightMeasureSpec);
  83. finalintwidth=MeasureSpec.getSize(widthMeasureSpec);
  84. finalintwidthMode=MeasureSpec.getMode(widthMeasureSpec);
  85. if(widthMode!=MeasureSpec.EXACTLY){
  86. thrownewIllegalStateException(
  87. "ScrollLayoutonlycanmCurScreenrunatEXACTLYmode!");
  88. }
  90. finalintheightMode=MeasureSpec.getMode(heightMeasureSpec);
  91. if(heightMode!=MeasureSpec.EXACTLY){
  92. thrownewIllegalStateException(
  93. "ScrollLayoutonlycanrunatEXACTLYmode!");
  94. }
  96. //ThechildrenaregiventhesamewidthandheightasthescrollLayout
  97. finalintcount=getChildCount();
  98. for(inti=0;i<count;i++){
  99. getChildAt(i).measure(widthMeasureSpec,heightMeasureSpec);
  100. }
  101. System.out.println("movingtoscreen"+mCurScreen);
  102. scrollTo(mCurScreen*width,0);
  103. }
  105. /**
  106. *Accordingtothepositionofcurrentlayoutscrolltothedestination
  107. *page.
  108. */
  109. publicvoidsnapToDestination(){
  110. finalintscreenWidth=getWidth();
  111. finalintdestScreen=(getScrollX()+screenWidth/2)/screenWidth;
  112. snapToScreen(destScreen);
  113. }
  115. publicvoidsnapToScreen(intwhichScreen){
  116. //getthevalidlayoutpage
  117. whichScreen=Math.max(0,Math.min(whichScreen,getChildCount()-1));
  118. if(getScrollX()!=(whichScreen*getWidth())){
  120. finalintdelta=whichScreen*getWidth()-getScrollX();
  121. mScroller.startScroll(getScrollX(),0,delta,0,
  122. Math.abs(delta)*2);
  123. mCurScreen=whichScreen;
  124. invalidate();//Redrawthelayout
  125. }
  126. }
  128. publicvoidsetToScreen(intwhichScreen){
  129. whichScreen=Math.max(0,Math.min(whichScreen,getChildCount()-1));
  130. mCurScreen=whichScreen;
  131. scrollTo(whichScreen*getWidth(),0);
  132. }
  134. publicintgetCurScreen(){
  135. returnmCurScreen;
  136. }
  138. @Override
  139. publicvoidcomputeScroll(){
  140. //TODOAuto-generatedmethodstub
  141. if(mScroller.computeScrollOffset()){
  142. scrollTo(mScroller.getCurrX(),mScroller.getCurrY());
  143. postInvalidate();
  144. }
  145. }
  147. @Override
  148. publicbooleanonTouchEvent(MotionEventevent){
  149. //TODOAuto-generatedmethodstub
  151. if(mVelocityTracker==null){
  152. mVelocityTracker=VelocityTracker.obtain();
  153. }
  154. mVelocityTracker.addMovement(event);
  156. finalintaction=event.getAction();
  157. finalfloatx=event.getX();
  158. finalfloaty=event.getY();
  160. switch(action){
  161. caseMotionEvent.ACTION_DOWN:
  162. Log.e(TAG,"eventdown!");
  163. if(!mScroller.isFinished()){
  164. mScroller.abortAnimation();
  165. }
  166. mLastMotionX=x;
  167. break;
  169. caseMotionEvent.ACTION_MOVE:
  170. intdeltaX=(int)(mLastMotionX-x);
  171. mLastMotionX=x;
  173. scrollBy(deltaX,0);
  174. break;
  176. caseMotionEvent.ACTION_UP:
  177. Log.e(TAG,"event:up");
  179. //if(mTouchState==TOUCH_STATE_SCROLLING){
  180. finalVelocityTrackervelocityTracker=mVelocityTracker;
  181. velocityTracker.computeCurrentVelocity(1000);
  182. intvelocityX=(int)velocityTracker.getXVelocity();
  184. Log.e(TAG,"velocityX:"+velocityX);
  186. if(velocityX>SNAP_VELOCITY&&mCurScreen>0){
  187. //Flingenoughtomoveleft
  188. Log.e(TAG,"snapleft");
  189. onScreenChangeListener.onScreenChange(mCurScreen-1);
  190. System.out.println("mCurScreen="+(mCurScreen-1));
  191. snapToScreen(mCurScreen-1);
  192. }elseif(velocityX<-SNAP_VELOCITY
  193. &&mCurScreen<getChildCount()-1){
  194. //Flingenoughtomoveright
  195. Log.e(TAG,"snapright");
  196. onScreenChangeListener.onScreenChange(mCurScreen+1);
  197. //只往右移动才加载数据
  198. onScreenChangeListenerDataLoad.onScreenChange(mCurScreen+1);
  199. snapToScreen(mCurScreen+1);
  200. }else{
  201. snapToDestination();
  202. }
  204. if(mVelocityTracker!=null){
  205. mVelocityTracker.recycle();
  206. mVelocityTracker=null;
  207. }
  208. //}
  209. mTouchState=TOUCH_STATE_REST;
  210. break;
  211. caseMotionEvent.ACTION_CANCEL:
  212. mTouchState=TOUCH_STATE_REST;
  213. break;
  214. }
  216. returntrue;
  217. }
  219. @Override
  220. publicbooleanonInterceptTouchEvent(MotionEventev){
  221. //TODOAuto-generatedmethodstub
  222. Log.e(TAG,"onInterceptTouchEvent-slop:"+mTouchSlop);
  224. finalintaction=ev.getAction();
  225. if((action==MotionEvent.ACTION_MOVE)
  226. &&(mTouchState!=TOUCH_STATE_REST)){
  227. returntrue;
  228. }
  230. finalfloatx=ev.getX();
  231. finalfloaty=ev.getY();
  233. switch(action){
  234. caseMotionEvent.ACTION_MOVE:
  235. finalintxDiff=(int)Math.abs(mLastMotionX-x);
  236. if(xDiff>mTouchSlop){
  237. mTouchState=TOUCH_STATE_SCROLLING;
  239. }
  240. break;
  242. caseMotionEvent.ACTION_DOWN:
  243. mLastMotionX=x;
  244. mLastMotionY=y;
  245. mTouchState=mScroller.isFinished()?TOUCH_STATE_REST
  246. :TOUCH_STATE_SCROLLING;
  247. break;
  249. caseMotionEvent.ACTION_CANCEL:
  250. caseMotionEvent.ACTION_UP:
  251. mTouchState=TOUCH_STATE_REST;
  252. break;
  253. }
  255. returnmTouchState!=TOUCH_STATE_REST;
  256. }
  258. //分页监听
  259. publicinterfaceOnScreenChangeListener{
  260. voidonScreenChange(intcurrentIndex);
  261. }
  263. privateOnScreenChangeListeneronScreenChangeListener;
  265. publicvoidsetOnScreenChangeListener(
  266. OnScreenChangeListeneronScreenChangeListener){
  267. this.onScreenChangeListener=onScreenChangeListener;
  268. }
  271. //动态数据监听
  272. publicinterfaceOnScreenChangeListenerDataLoad{
  273. voidonScreenChange(intcurrentIndex);
  274. }
  275. privateOnScreenChangeListenerDataLoadonScreenChangeListenerDataLoad;
  277. publicvoidsetOnScreenChangeListenerDataLoad(OnScreenChangeListenerDataLoadonScreenChangeListenerDataLoad){
  278. this.onScreenChangeListenerDataLoad=onScreenChangeListenerDataLoad;
  279. }
  281. }
[java] view plain copy
  1. packagecn.anycall.ju;
  3. importandroid.content.Context;
  4. importandroid.graphics.Canvas;
  5. importandroid.util.AttributeSet;
  6. importandroid.util.Log;
  7. importandroid.view.MotionEvent;
  8. importandroid.view.VelocityTracker;
  9. importandroid.view.View;
  10. importandroid.view.ViewConfiguration;
  11. importandroid.view.ViewGroup;
  12. importandroid.widget.Scroller;
  14. /**
  15. *仿Launcher中的WorkSapce，可以左右滑动切换屏幕的类
  16. *
  17. */
  18. publicclassScrollLayoutextendsViewGroup{
  20. privatestaticfinalStringTAG="ScrollLayout";
  21. privateScrollermScroller;
  22. privateVelocityTrackermVelocityTracker;
  24. privateintmCurScreen;
  25. privateintmDefaultScreen=0;
  27. privatestaticfinalintTOUCH_STATE_REST=0;
  28. privatestaticfinalintTOUCH_STATE_SCROLLING=1;
  30. privatestaticfinalintSNAP_VELOCITY=600;
  32. privateintmTouchState=TOUCH_STATE_REST;
  33. privateintmTouchSlop;
  34. privatefloatmLastMotionX;
  35. privatefloatmLastMotionY;
  37. privateintcurrentScreenIndex=0;
  39. publicintgetCurrentScreenIndex(){
  40. returncurrentScreenIndex;
  41. }
  43. publicvoidsetCurrentScreenIndex(intcurrentScreenIndex){
  44. this.currentScreenIndex=currentScreenIndex;
  45. }
  47. publicScrollLayout(Contextcontext,AttributeSetattrs){
  48. this(context,attrs,0);
  49. //TODOAuto-generatedconstructorstub
  50. }
  52. publicScrollLayout(Contextcontext,AttributeSetattrs,intdefStyle){
  53. super(context,attrs,defStyle);
  54. //TODOAuto-generatedconstructorstub
  55. mScroller=newScroller(context);
  57. mCurScreen=mDefaultScreen;
  58. mTouchSlop=ViewConfiguration.get(getContext()).getScaledTouchSlop();
  59. }
  61. @Override
  62. protectedvoidonLayout(booleanchanged,intl,intt,intr,intb){
  63. //TODOAuto-generatedmethodstub
  64. intchildLeft=0;
  65. finalintchildCount=getChildCount();
  66. System.out.println("childCount="+childCount);
  67. for(inti=0;i<childCount;i++){
  68. finalViewchildView=getChildAt(i);
  69. if(childView.getVisibility()!=View.GONE){
  70. finalintchildWidth=childView.getMeasuredWidth();
  71. childView.layout(childLeft,0,childLeft+childWidth,
  72. childView.getMeasuredHeight());
  73. childLeft+=childWidth;
  74. }
  75. }
  76. }
  78. @Override
  79. protectedvoidonMeasure(intwidthMeasureSpec,intheightMeasureSpec){
  80. Log.e(TAG,"onMeasure");
  81. super.onMeasure(widthMeasureSpec,heightMeasureSpec);
  83. finalintwidth=MeasureSpec.getSize(widthMeasureSpec);
  84. finalintwidthMode=MeasureSpec.getMode(widthMeasureSpec);
  85. if(widthMode!=MeasureSpec.EXACTLY){
  86. thrownewIllegalStateException(
  87. "ScrollLayoutonlycanmCurScreenrunatEXACTLYmode!");
  88. }
  90. finalintheightMode=MeasureSpec.getMode(heightMeasureSpec);
  91. if(heightMode!=MeasureSpec.EXACTLY){
  92. thrownewIllegalStateException(
  93. "ScrollLayoutonlycanrunatEXACTLYmode!");
  94. }
  96. //ThechildrenaregiventhesamewidthandheightasthescrollLayout
  97. finalintcount=getChildCount();
  98. for(inti=0;i<count;i++){
  99. getChildAt(i).measure(widthMeasureSpec,heightMeasureSpec);
  100. }
  101. System.out.println("movingtoscreen"+mCurScreen);
  102. scrollTo(mCurScreen*width,0);
  103. }
  105. /**
  106. *Accordingtothepositionofcurrentlayoutscrolltothedestination
  107. *page.
  108. */
  109. publicvoidsnapToDestination(){
  110. finalintscreenWidth=getWidth();
  111. finalintdestScreen=(getScrollX()+screenWidth/2)/screenWidth;
  112. snapToScreen(destScreen);
  113. }
  115. publicvoidsnapToScreen(intwhichScreen){
  116. //getthevalidlayoutpage
  117. whichScreen=Math.max(0,Math.min(whichScreen,getChildCount()-1));
  118. if(getScrollX()!=(whichScreen*getWidth())){
  120. finalintdelta=whichScreen*getWidth()-getScrollX();
  121. mScroller.startScroll(getScrollX(),0,delta,0,
  122. Math.abs(delta)*2);
  123. mCurScreen=whichScreen;
  124. invalidate();//Redrawthelayout
  125. }
  126. }
  128. publicvoidsetToScreen(intwhichScreen){
  129. whichScreen=Math.max(0,Math.min(whichScreen,getChildCount()-1));
  130. mCurScreen=whichScreen;
  131. scrollTo(whichScreen*getWidth(),0);
  132. }
  134. publicintgetCurScreen(){
  135. returnmCurScreen;
  136. }
  138. @Override
  139. publicvoidcomputeScroll(){
  140. //TODOAuto-generatedmethodstub
  141. if(mScroller.computeScrollOffset()){
  142. scrollTo(mScroller.getCurrX(),mScroller.getCurrY());
  143. postInvalidate();
  144. }
  145. }
  147. @Override
  148. publicbooleanonTouchEvent(MotionEventevent){
  149. //TODOAuto-generatedmethodstub
  151. if(mVelocityTracker==null){
  152. mVelocityTracker=VelocityTracker.obtain();
  153. }
  154. mVelocityTracker.addMovement(event);
  156. finalintaction=event.getAction();
  157. finalfloatx=event.getX();
  158. finalfloaty=event.getY();
  160. switch(action){
  161. caseMotionEvent.ACTION_DOWN:
  162. Log.e(TAG,"eventdown!");
  163. if(!mScroller.isFinished()){
  164. mScroller.abortAnimation();
  165. }
  166. mLastMotionX=x;
  167. break;
  169. caseMotionEvent.ACTION_MOVE:
  170. intdeltaX=(int)(mLastMotionX-x);
  171. mLastMotionX=x;
  173. scrollBy(deltaX,0);
  174. break;
  176. caseMotionEvent.ACTION_UP:
  177. Log.e(TAG,"event:up");
  179. //if(mTouchState==TOUCH_STATE_SCROLLING){
  180. finalVelocityTrackervelocityTracker=mVelocityTracker;
  181. velocityTracker.computeCurrentVelocity(1000);
  182. intvelocityX=(int)velocityTracker.getXVelocity();
  184. Log.e(TAG,"velocityX:"+velocityX);
  186. if(velocityX>SNAP_VELOCITY&&mCurScreen>0){
  187. //Flingenoughtomoveleft
  188. Log.e(TAG,"snapleft");
  189. onScreenChangeListener.onScreenChange(mCurScreen-1);
  190. System.out.println("mCurScreen="+(mCurScreen-1));
  191. snapToScreen(mCurScreen-1);
  192. }elseif(velocityX<-SNAP_VELOCITY
  193. &&mCurScreen<getChildCount()-1){
  194. //Flingenoughtomoveright
  195. Log.e(TAG,"snapright");
  196. onScreenChangeListener.onScreenChange(mCurScreen+1);
  197. //只往右移动才加载数据
  198. onScreenChangeListenerDataLoad.onScreenChange(mCurScreen+1);
  199. snapToScreen(mCurScreen+1);
  200. }else{
  201. snapToDestination();
  202. }
  204. if(mVelocityTracker!=null){
  205. mVelocityTracker.recycle();
  206. mVelocityTracker=null;
  207. }
  208. //}
  209. mTouchState=TOUCH_STATE_REST;
  210. break;
  211. caseMotionEvent.ACTION_CANCEL:
  212. mTouchState=TOUCH_STATE_REST;
  213. break;
  214. }
  216. returntrue;
  217. }
  219. @Override
  220. publicbooleanonInterceptTouchEvent(MotionEventev){
  221. //TODOAuto-generatedmethodstub
  222. Log.e(TAG,"onInterceptTouchEvent-slop:"+mTouchSlop);
  224. finalintaction=ev.getAction();
  225. if((action==MotionEvent.ACTION_MOVE)
  226. &&(mTouchState!=TOUCH_STATE_REST)){
  227. returntrue;
  228. }
  230. finalfloatx=ev.getX();
  231. finalfloaty=ev.getY();
  233. switch(action){
  234. caseMotionEvent.ACTION_MOVE:
  235. finalintxDiff=(int)Math.abs(mLastMotionX-x);
  236. if(xDiff>mTouchSlop){
  237. mTouchState=TOUCH_STATE_SCROLLING;
  239. }
  240. break;
  242. caseMotionEvent.ACTION_DOWN:
  243. mLastMotionX=x;
  244. mLastMotionY=y;
  245. mTouchState=mScroller.isFinished()?TOUCH_STATE_REST
  246. :TOUCH_STATE_SCROLLING;
  247. break;
  249. caseMotionEvent.ACTION_CANCEL:
  250. caseMotionEvent.ACTION_UP:
  251. mTouchState=TOUCH_STATE_REST;
  252. break;
  253. }
  255. returnmTouchState!=TOUCH_STATE_REST;
  256. }
  258. //分页监听
  259. publicinterfaceOnScreenChangeListener{
  260. voidonScreenChange(intcurrentIndex);
  261. }
  263. privateOnScreenChangeListeneronScreenChangeListener;
  265. publicvoidsetOnScreenChangeListener(
  266. OnScreenChangeListeneronScreenChangeListener){
  267. this.onScreenChangeListener=onScreenChangeListener;
  268. }
  271. //动态数据监听
  272. publicinterfaceOnScreenChangeListenerDataLoad{
  273. voidonScreenChange(intcurrentIndex);
  274. }
  275. privateOnScreenChangeListenerDataLoadonScreenChangeListenerDataLoad;
  277. publicvoidsetOnScreenChangeListenerDataLoad(OnScreenChangeListenerDataLoadonScreenChangeListenerDataLoad){
  278. this.onScreenChangeListenerDataLoad=onScreenChangeListenerDataLoad;
  279. }
  281. }



main.xml
Xml代码
  1. <?xmlversion="1.0"encoding="utf-8"?>
  2. <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
  3. android:orientation="vertical"
  4. android:layout_width="fill_parent"
  5. android:layout_height="fill_parent"
  6. >
  7. <TextViewandroid:layout_width="fill_parent"
  8. android:layout_height="wrap_content"android:text="仿淘宝聚划算"/>
  9. <RelativeLayout
  10. android:id="@+id/myView"
  11. android:layout_width="fill_parent"
  12. android:layout_height="fill_parent"
  13. >
  14. <cn.anycall.ju.ScrollLayout
  15. xmlns:android="http://schemas.android.com/apk/res/android"
  16. android:id="@+id/ScrollLayoutTest"
  17. android:layout_width="fill_parent"
  18. android:layout_height="fill_parent"android:background="#000000">
  19. </cn.anycall.ju.ScrollLayout>
  21. <cn.anycall.ju.PageControlView
  22. android:id="@+id/pageControl"
  23. android:layout_width="fill_parent"
  24. android:layout_height="40px"
  25. android:background="#8f00000f"
  26. android:layout_alignParentBottom="true"
  27. android:gravity="center"/>
  28. </RelativeLayout>
  29. </LinearLayout>
[xml] view plain copy
  1. <?xmlversion="1.0"encoding="utf-8"?>
  2. <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
  3. android:orientation="vertical"
  4. android:layout_width="fill_parent"
  5. android:layout_height="fill_parent"
  6. >
  7. <TextViewandroid:layout_width="fill_parent"
  8. android:layout_height="wrap_content"android:text="仿淘宝聚划算"/>
  9. <RelativeLayout
  10. android:id="@+id/myView"
  11. android:layout_width="fill_parent"
  12. android:layout_height="fill_parent"
  13. >
  14. <cn.anycall.ju.ScrollLayout
  15. xmlns:android="http://schemas.android.com/apk/res/android"
  16. android:id="@+id/ScrollLayoutTest"
  17. android:layout_width="fill_parent"
  18. android:layout_height="fill_parent"android:background="#000000">
  19. </cn.anycall.ju.ScrollLayout>
  21. <cn.anycall.ju.PageControlView
  22. android:id="@+id/pageControl"
  23. android:layout_width="fill_parent"
  24. android:layout_height="40px"
  25. android:background="#8f00000f"
  26. android:layout_alignParentBottom="true"
  27. android:gravity="center"/>
  28. </RelativeLayout>
  29. </LinearLayout>

app_item.xml
Xml代码
  1. <?xmlversion="1.0"encoding="utf-8"?>
  2. <RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
  3. android:layout_width="fill_parent"
  4. android:layout_height="wrap_content"
  5. >
  6. <RelativeLayoutandroid:id="@+id/alllayout"android:layout_width="wrap_content"android:layout_height="wrap_content">
  7. <RelativeLayoutandroid:id="@+id/imglayout"android:layout_width="160dp"android:layout_height="160dp"android:background="@drawable/mer_border">
  8. <ImageViewandroid:id="@+id/imgdetail"android:layout_width="145dp"android:layout_height="145dp"android:layout_margin="8dp"/>
  9. <TextViewandroid:id="@+id/price"android:layout_width="180dp"android:layout_height="wrap_content"android:text="12345"android:layout_alignParentBottom="true"android:background="#C02000"android:textColor="#FFFFFF"/>
  10. <TextViewandroid:id="@+id/look"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="去看看"android:layout_alignParentBottom="true"android:layout_alignParentRight="true"android:background="#C02000"android:textColor="#FFFFFF"/>
  11. </RelativeLayout>
  12. <TextViewandroid:id="@+id/tuaninfo"android:layout_width="fill_parent"
  13. android:layout_height="wrap_content"android:textSize="16dp"
  14. android:maxLines="2"android:layout_below="@id/imglayout"
  15. android:ellipsize="end"android:text="dddddddddd"/>"
  16. </RelativeLayout>
  17. </RelativeLayout>
[xml] view plain copy 源码下载： http://download.csdn.net/detail/javadxz/6910017
  1. <?xmlversion="1.0"encoding="utf-8"?>
  2. <RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
  3. android:layout_width="fill_parent"
  4. android:layout_height="wrap_content"
  5. >
  6. <RelativeLayoutandroid:id="@+id/alllayout"android:layout_width="wrap_content"android:layout_height="wrap_content">
  7. <RelativeLayoutandroid:id="@+id/imglayout"android:layout_width="160dp"android:layout_height="160dp"android:background="@drawable/mer_border">
  8. <ImageViewandroid:id="@+id/imgdetail"android:layout_width="145dp"android:layout_height="145dp"android:layout_margin="8dp"/>
  9. <TextViewandroid:id="@+id/price"android:layout_width="180dp"android:layout_height="wrap_content"android:text="12345"android:layout_alignParentBottom="true"android:background="#C02000"android:textColor="#FFFFFF"/>
  10. <TextViewandroid:id="@+id/look"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="去看看"android:layout_alignParentBottom="true"android:layout_alignParentRight="true"android:background="#C02000"android:textColor="#FFFFFF"/>
  11. </RelativeLayout>
  12. <TextViewandroid:id="@+id/tuaninfo"android:layout_width="fill_parent"
  13. android:layout_height="wrap_content"android:textSize="16dp"
  14. android:maxLines="2"android:layout_below="@id/imglayout"
  15. android:ellipsize="end"android:text="dddddddddd"/>"
  16. </RelativeLayout>
  17. </RelativeLayout>

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